Mounting for wheel-dressing tools



Dec. 9 9 1924- W. E. ROSS MOUNTING FOR WHEEL DRESSING TOOLS @7220: f iwelar Patented Dec. 9, 1924. p I untrue "STATES PA ENT emcewmnram n Bliss; or cnrcaeo, ILLmoIs.

moon'rme ron wnnnnnnnssind TOOLS.

Application meenay 1c, 1921. Serial reassess.

' are required to be so ported with accuracy without restricting t 'eir freedom of revlution; and will be -herein illustrated-as applied-to wheel dressing tools which embody in their organization a roll having a substantially cylindrical surface and which revolves freely while its surface is in contact with the surface of the wheel to be dressed. In wheel dressing tools of this kind, and particularlywhere the dimension of the cylindrical dressing surface has considerable extent in the direction of the axis of the cylinder, it is'vcrydmportant that the roll be supported with extreme rigidity with reference to its axis of revolution without'imposing any restriction upon,

its freedom of revolution under the frictional drive of the wheel-surface upon which it is operating. Moverover, it is necessary that these conditions of accuracy of support and freedom of revolution be; maintained notwithstanding wear on the parts as the tool continues in use. A

It has long been the practice to support the roll of the dressing-tool through the medium I of anti-friction hearings mounted upon a spindle, sup 'mrtc-d in the arms of a forked frame, and to provide ahutmentsior the bearings at the opposite ends of the roll 40 which hold them closely together to keep the bearings tight, these ahulmentsbeing relatively adjustable so that the axial pressure upon the bearings might be changed at will.

But two serious ob ections have arisen in 5 constructions heretofore employed for ac complishing this result.. In the first place, i

, one or both of the arms of the forked frame have been utilized as an abutment or abutments for the bearings so that in drawing the bearing tight, through means of the:

spindle acting as abolt, the fork has necessarily been s rung so that the inner face or faces of tlie fork, which htbe originally dressed tooa plane accurate y per pendieular to the axis of the spindle, would bear unevenlyupon-the cone or cones of the bearing, with the result'that the 'roll was inaccurately sustained and would develop vibration in its revolution; moreover, the

use of an inner face of thefork as an abutment involvcs 'expensii'e dressing of such.

face. Again, experience has-shown'it to be no longer remain in suchrelation and would inadvisable to-have the bearings adjustable at the will of the operator,"'because many workmen will either neglect the adjustment of the dressing tool or will, adjust the. bearings too tightly, "with the result v.that the originalidesideratum'fo'f 'extrnie accuracy of of it s objects to provide a'n im roved-antifriction mounting for' "the i rol of. heel dressing tools, which will hold'the roll with great accuracy under, difierent' adjustments a that may be" imparbedtd the bearings; and,

accordingly," one"feature of the invention consists in providin' theforlted frame with a spindle to receive t efimtifriction bearings that support the rolriwhichf s indle hasa seat that fixes-it radially, an preferably support withperfect freedom of revolution ,wi lnotbemaintditiedfi Now the present invention has for one longitudinally as'well, in-one fork of the frame, and has a shoulder that is presented beyond the inner face ofsaid fork when the spindle is seated therein in-order to constitute the axialfabutment of the anti-friction bearing at'that "end of the roll; :a nut threaded up'onthe o opposite end of the spindle and which acts axiall againstthe anti-friction hearings, preferably indirectly through the medium of acompression spring, being employed as the bearing abutmentat the other end of the roll, so that ext-neither end of the roll is the inner face of the frame relied on to support the bearing and any springing of theframe under the tightenin of the nut will still leave the faces of the a utment normal to the axis of revolution. When, as in the preferred i-m-' bodiment of this part of the invention. the adjusting nut has a cylindrical body which is accurately fittedin-thehoreof the fork it further contributes to the accuracy of support of the spindle, and when an interposed spring between the "nut and the hearing constitutesthe immediate abutment at that end of. the roll, and the nut is adjusted until its head brings up' tightly against the outside of the forkand ahead on the spindle is brought tightly against outside' of the opposite fork as in the preferred embodiment of the invention, the

taining accuracy of support at all times or- 1 with very much less attention to the c dition of the bearin and,'accordingly, an.-

- other Alieaturi: .of -t e-invention consists in introducinw a compression spring between the anti-friction bearing and .the abutment which sustains the bearing at one end of the roll, and'pr'eferably in anor an'ization in --wh1ch one abutment is' afforded by -a.sl1oul-.

der on the spindle, and the spindle is drawn axially to develop initial compression of the 2 spring and determine. the sustaining pres-V sure/upon theibearinggthe preferred embodiment of thispart of the invention including the feature of utilizing the shoulder.

on the spiridlens a. direct-bearing abutment at onc end'ofyth'c roll and sustain ng the spring under "compress on as the bearing abutmentatftheiother end, of the roll; plac-' ing the i'spi-ingl'under compression b drawing the s'pindleinward' and prefera 1y also including-the? a ent-til so that the' l'sipring isfhoused in the bore 0 the fork in whic'h'thc nut is centered.

A distinct advantage arisesirom comthe spring which constitutes one abutment will he "initially-i placed under compression exactly suitable for the bearing adjustment. desired and vcannot thereafter be compressed to a greater degrcepin otherwords, the tool can he given intoihe hands ofthe operative with assurance that-the hearing will remain accurat and 'without opportunity for tamporing with the adjustment.

In the accompanying drawings Figure '1 is an axial section of a tool embodying the several features of the present invention. 4 65. Figure 2 is a fragmentary elevation ,of the right-hand end of Fi'gure i Figures 3 and 4 are, respectively, an end elevation and a side elevation of one of the bushings that support the anti-friction bear 6o ing upon the spindle. Figures 5, 6, 7 and 8 show in axial alinement-but segregated, respectively, the nut,

lock washer, spring, and spindleemployed in Figurel. Y l V a.

05 1 represents'the dressing roll, 2 the spine. nut; which draws. the spindlejas, the abutment. for the spring% dle,-3 the forked frame, and a the shank of the tool-which may correspondin'construction and design substantially with corresponding parts heretofore employed in tools of this character. I

It has been the practice to support th roll 1 upon the spindle 2 through means of combined .radial' and thrust ball bearings comprising inner racewaysfi and outerracw ways .6. It has also been proposed to supporl such bearings vupon the spindle 2 through In the medium of flanged bushings 7 longitu nally adjustable on the spindle to press the inner raceways 5 axially inward with rehitained by the roll 1 in order to maintain ancurate bearing between the balls and the raceways. In this adjustment it is preferable to hold the bushing '7' agaii1st,rotation j l 2' upon the'spindle 2. This has-heretofor been accomplished by means of aspline or key inserted into the bushing and the spindle. But I prefer to accomplish this-by the.-

means described in my app ication Serial No. 452,119, which comprises flattened faces 8 uponthe bushings T indoor-responding ftion to the outer raceways 6 that-"are susflattened face '9 upon the indle 2 to re- .ceive said-faces. r

. To firmly mount the spindle 2 in the frame 3 and adjustably sustain the combined radial and thrust bearings, the present invention provides an enla rgemcnt or shoulder 10 upon the spindle 2 through which it fits accurately in one fork 'of the ,frame 3 and affords abutment for one of the bushings 7, and applies to the opposite end of said spindle a headed nut 11 adjustablyvfitted thereon. through the medium of threads 12 in a man ner to support the opposite bushing 7. Spindle? is provided with a-face 13 upon its enlarged and and seats upon the face- 1 of the. fork of the f-ramethat receivesit and holds the spindle against rotation with the nut 11. Nut 1] fits very accurately in the fork of the frame 3 which receives it, and to gather with the enhrrgedemfl of the spindle 2 rigidly centers the spindle in the frame. Nut 11 does not hear directly against the bushing 7 but presses the same through the medium of a helical compression spring 15 so that when the nut 11 is screwed up to develop proper pressure through the medium of the spring, the hearings will hekept tight indefinitely and a serious cause of inferiority in the work of tools of this kind willitherehy be avoided. The head of nut 11 seats.

An important feature of my invention resides. in the fact that the shoulder 10 and spring 15 sustain the adjustable members of the bearings out of contact with the inner faces. of the frame 3. Another important feature resides in the fact that spindle 2 is seated immovably in the frame and is held in its seat by the nut 11. Another important feature resides in the fact that initial adustment is accomplished through means 0 the nut 11, and spring 15 will take up any looseness that may develop in the bearing at any time without further adjustment of the nut I claim: v

1. In a device of the character described a frame, a spindle mounted at one end in said frame having a shoulderpresented inwardly beyond the frame, a rotary member, adjustable= bearings mounting said rotary member on said spind1e,'a nut drawing the spindle in the direction to press its said oulder against the bearingat one end of the rotary member, and a compression sprm acting against thebearing at the other en of the rotary member, longitudinally of the spindle, and in opposition to said s ioulder.

2. In an antifriction bearing of the chara'cter described, a'frame, a spindle fixedlyseated in the vframe, a rotating member, bearings mountingsaid member on said spindle, and a nut drawing the spindle to its seat-in the frame and imparting adjustment to'said bearings; an axially acting spring being interposed between the nut and a bearing.

3. In a device of the character described,

,a frame, a spindle having an end through which it is fixedly supported in said frame and a shoulder at said end providing an axially presentedabutment on the inner side of the frame, a rotary member, bearings mounting said member upon the spindle and w adapted to be sustained by said and a nut on the opposite end of the spindle abutment,

of said member and in opposition to said abutment.

5. In a device of the character described, a spindle, a rotary member, adjustable ball bearings supporting said member upon said spindle, means for adjusting said bearings including an abutment sustaining the bean mgs axially at one end of said member, and

a spring having a support holding it under compression and causing it to act axially against the bearings at the other end of said member and in'opposition tosaid abutment; means being provided for varying the distance between the spring support and the abutment and thereby determining the compression upon the spring.

6. In a tool for dressing the surfaces'ot' grinding wheels, a frame, a dressing roll,

bearings. for said roll adjustably related thereto, a spindle in said frame supporting said roll through the medium of said bearings and having a'slloulder through which it acts in one axial direction to impartedjustment to the bearings, means for imparting longitudinal movement to the spindle in said direction, and a spring resiliently sustaining the bearings against said adjustment. 7. In a grinding wheel dressing tool, a

support, a spindle mounted in said support,

a dressing roll, ball bearings supporting said dressing roll upon said spindle, a spring;

surrounding the spindle and acting against said hearings in, the direction of the axis or the spindle, at one end of said roll, means supporting the bearings at the other end of the rollin opposition to said spring, and

screw threaded means compressing said spring and determining its pressure against the bearihgs. I I

8. In a tool for dressing indin wheels, 2. support, a spindle mounted in sai support and having at one end a head seated against the support, a dressing roll, ball bearings mounting said roll upon said spindle and having an abutment at the end of the roll adjacent said head, a compression spring surroundim the spindle at the, other end of. the roll and acting against the bearings in opposition to said abutment, and a nut on i the s indie at said other end of'the roll, seate against the frame, drawing the head of the-spindle against the ,frame, and compressing the spring and causing'the latter to guess against the bearings.

igned at Chicago, Illinois, this 11th day of May, 1921. r WILLIAM lihROSS, 

